Title:
TAR ACID PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2018/225287
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a tar acid production method with which it is possible to more easily reduce the amount of basic substances contained in tar acids. This tar acid production method involves: step A of adding an alkali to carbolic oil and/or naphthalene oil obtained by distilling coal tar, thereby converting tar acids contained in the carbolic oil and/or naphthalene oil into tar acid salts; step B of adding basic-substance-containing tar acids to the tar acid salts obtained in step A, thereby providing a mixture; step C of adding an acid to the mixture obtained in step B, thereby providing crude tar acids; and step D of distilling the crude tar acids obtained in step C, thereby providing tar acids.
Inventors:
NAKAMICHI YUKI (JP)
KINOSHITA NAOBUMI (JP)
KINOSHITA NAOBUMI (JP)
Application Number:
PCT/JP2017/046747
Publication Date:
December 13, 2018
Filing Date:
December 26, 2017
Export Citation:
Assignee:
JFE CHEMICAL CORP (JP)
International Classes:
C07C37/86; C07C37/74; C07C39/04; C07C39/07; C10C1/12; C10C1/14
Foreign References:
| JPH04352739A | 1992-12-07 | |||
| JPH0741768A | 1995-02-10 | |||
| JPS6393743A | 1988-04-25 | |||
| CN101407725A | 2009-04-15 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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